31 results about "1-Butyl-3-methylimidazolium hexafluorophosphate" patented technology

An improved electrolyte for a cell having an anode comprising magnesium or magnesium alloy. The cell's cathode may desirably include iron disulfide (FeS2) as cathode active material. The improved electrolyte comprises a magnesium salt, preferably magnesium perchlorate dissolved in an organic solvent which preferably includes acetonitrile or mixture of tetrahydrofuran and propylene carbonate. The electrolyte includes an additive to retard the buildup of deleterious passivation coating on the magnesium anode surface, thereby enhancing cell performance. Such additive may preferably include 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4), 1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF6), lithium hexafluorophosphate (LiPF6), or aluminum chloride (AlCl3).

The invention discloses a synthesizing method of polyimide. The method comprises the following step that: an aromatic diamine compound and an aromatic dianhydride compound are subject to a polymerization reaction in an ionic liquid, such that polyimide is obtained. The ionic liquid can be any one of 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-3-methylimidazolium acetate, 1-ethyl-3-methylimidazolium dicyanamide, 1-butyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium hexafluorophosphate, 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, and 1-butyl-3-methylimidazolium trifluoromethanesulfonate. The operation of the method is simple, the product made with the method is easy to purify and has high dissolvability (the product can be dissolved in regular solvents of N, N-dimethylacetamide, or tetrahydrofuran). The method has advantages of high yield, stable performance, good application prospect, and is suitable for industrialized production. Withthe method, polyimide films or fibers can be produced.

The invention discloses a preparation method and application of a visible light response hydrogen generation photocatalyst GO / SiC / WO3. The preparation method comprises the following steps: a, siliconcarbide (SiC) is pretreated; b, tungsten trioxide (WO3) is taken as a raw material to prepare a 8wt% WO3 solution of a whole hydrothermal reaction system; c, 100 mL of the 8wt% WO3 solution is taken and placed in a beaker, and the SiC, graphene oxide (GO) and two drops of 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid are sequentially added, and ultrasonically stirred to be evenly mixed; and d, the mixture is transferred into a high-temperature reaction kettle to react for 20 h at 200 DEG C, then centrifugal washing is conducted till the pH is 7, the mixture is placed in a vacuumdrying box to be subjected to vacuum drying for standby application, and the visible light response hydrogen generation photocatalyst GO / SiC / WO3 is obtained through hydrothermal synthesis. Through the synergistic effect of the double cocatalysts, namely the graphene-like material GO and the non-graphene-like material WO3, and the amphipathicity of the ionic liquid, the visible light response hydrogen generation photocatalyst GO / SiC / WO3 is prepared, the performance of visible light photocatalytic water decomposition for hydrogen generation is improved, and a certain foundation can be laid forsubsequent efficient application of the visible light catalyst.

The invention discloses a 1,4-disubstituted-1,2,3-triazole compound preparation method which comprises the following steps: (1) adding a catalyst inorganic base in an ionic liquid, wherein the catalyst inorganic base is potassium hydroxide or sodium hydroxide, and the ionic liquid is 1-butyl-3-methylimidazolium tetrafluoroborate, 1-Buthyl-3-methylidazolium bromide or 1-butyl-3-methylimidazolium hexafluorophosphate; (2) adding raw material phenylacetaldehyde or substituted phenylacetaldehyde and pinacolborane in the mixed system formed in the step (1), reacting under the room temperature at the stirring condition, separating out the solid phase after reaction finishing, extracting diethyl ether, and drying to obtain the 1,4-disubstituted-1,2,3-triazole compound. The preparation method has the advantages that the catalytic system is simple, the operation is convenient, the reaction condition is mild, and reactive solvents can be recycled repeatedly.